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Finding the Fourth Proportional to 89,031.88, 133,613.16 and 71,710.84

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Solution

The fourth proportional to 89,031.88, 133,613.16 and 71,710.84 is: 107,618.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,031.88 : 133,613.16 = 71,710.84 : x
  2. Step 2: Convert to fraction form
    89,031.88/133,613.16 = 71,710.84/x
  3. Step 3: Cross multiply
    89,031.88x = 133,613.16 × 71,710.84
  4. Step 4: Simplify right side
    89,031.88x = 9,581,511,938.65
  5. Step 5: Solve for x
    x = 9,581,511,938.65/89,031.88
  6. Step 6: Final answer
    x = 107,618.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.